An Interdisciplinary Journal

2003, Vol.6, No.1, pp.502-514

Bend - Stretch Coupling and Nonlinear Vibrational Dynamics of a Carbon Dioxide Molecule
A.V.Kondratenko, J.Schroeder, and V.S.Vikhrenko

Chedin's strongly nonlinear potential is used to describe the vibrational dynamics of a carbon dioxide molecule. Amplitude - phase variables are introduced to separate slow and fast processes. The nonlinear coupling between bend and symmetric stretch vibrations that manifests itself as a slow process is investigated in detail. Efficient intermode energy redistribution is shown to occur, and characteristic frequencies of the energy exchange between the bend and symmetric stretch mode is estimated.
Key words: carbon dioxide, nonlinear intramolecular potential, vibrational energy redistribution, coupled oscillators, intermode energy exchange

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